Electric signaling apparatus.



J. J. GHEGAN.

' ELECTRIC SIGNALING APPARATUS.

APPLICATION FILED DEC. 20,1916- RENEWED JULY 3.1918.

1,275,902. Patented Aug. 13, 1918.

LL E 3 man 14km *onT STATES PATENT. OFFICE,

JOHN J. GHEGAN, or EAST ORANGE, NEW JERSEY;

ELECTRIC SIGNALING APPARATUS.

Specification of Ietters Patent. Patented Aug.- 13,1918.

Application filed December 20,111 916, Serial no. 137,934 Renewed my s,1918. Serial No. 243,250.

To all whom it may concern: 7

Be it known that I, JOHN J. 'GHEGAN, a citizen of the UnitedStates, andresident of East Orange, Essexj'county, New Jersey, have 'made'certainnew anduseful Improvements in Electric Signaling Apparatus, of

fwhich the following is a specification.

This invention relates to electro-magnets for use in a signalingcircuit, as at a station on a telegraphline, and the 'objectis to,substitute the alternating current from a main supply circuit for thelocal batteries heretofore employed. These 'batteries,'as is well known,have long been in use, and con sistoftwo or three cells, usually of zincand copper elements, in an exciting solution;

they require cleaning and renewal,fan d the price of zinc and copper hasso far advanced that a substitute is in demand. I I

The invention applies the improvement in a relay, a sounder or"recorder, or any electro-magnetic device} of similar character, andpreferably employs a solenoid coil and tubular core; the reciprocatingand preferably pivoted bar is capable of to-and-fro movement betweenstops, witha retracting device, like an adjustable helical spring. Thisbar has independent movement and is controlled by an actuator having'independent'movement. The actuator moves with the tubular cores of thesolenoid, and when at rest and circuit is closed, this actuator isentirely out of contact with the bar and free to vibrate under theinfluence of the alternating current, to a degreeslight and almostimperceptible, but as the actuator is practically free and clear fromthe bar, these vibrations of the actuatorare immaterial. When currentisbroken or cut oii in ,any Way, the actuator, under the influence ofitsretractor, moves upward and'impacts with thebar and the bar strikes itsupper fixed limit stop; "when circuit is closed again,-the actuator isdrawn down against the influence of the spring, and the bar, assisted by"a compression spring 1 acting against the force exerted by thefirst-named spring, strikesits lower limit stop, while the actuator,continuing its downward movement, leaves the bar and takes up anindependent, separated position, where any such chattering resultingfrom current alternations, is ineffective.

A sounder is referred to in the foregoing actuator may be secured.

invention.

In Fig". 1, the

description, but a relay or repeating sounder is adapted to the sameconstruction. 7

M The ad ustable contact carried by the 'bar bar is used to limit andestablish the extent of space through whichthe' actuator is free tovibrate without impartingits vibrations to the bargwhereby the bestposition of the The accompanyingdrawings illustrate the bar, theadjustment'for said spring, the adjustable stop carried by the bar andthe sliding pin passing through the bar. Fig.

3 shows a public supply alternating current circuit with step-downtransformer, supplying lamps and local'battery current at a telegraphstation, and a local circuit containing a sounder operated by arelay ona telegraph circuit; 4 V

Morse sounder, s, has two solenoid coils, 9 and 10, fixed onfa metalbase, '11; thebar, a, has'trunnion bearings at 12mm 13'; there is ametal pillar, 14, fixed, on base 11," and binding posts, 15, 16,

for coil terminals on wooden base, 17. The

support, 18, for the two bearings 12, 13, is also supported on metalbase 11. The'actuator, "20, is of thin'metal, and the magnet is made asfree from hysteresisas possible; there are two soft iron tubular cores,0, which reciprocate in the solenoids. to the extent substantially asshown. There is a pin, p, firmly fixed to actuator 20;,this pin 19passes through a perforation in adjustlng screw 21 and has a retractingspring, 22, supporteclby adjusting screw,'23 screw 23 is supported onbracket, 24, and bracket 24 is fixed to support, 18. .The bar a isdepressed by adjustable compression spring, 25.

is adapted to vary the point in the upward movement of the actuatorwhere the actuator'inakes' impactwith the bar, or, in other "words, theadjustable stop carried by the When relay 7 is on its front contacttransformer, and actuator 20 is drawn down out of engagement withadjustable stop 21,

carried on bar a, actuator 20 vibrates or chatters slightly, and almostimperceptibly, but to an immaterial extent, and spring 25 holds barj'aon, itsdown-contact, 32; contact stop 32 engages post 14, while pin 79,sliding through stop 21, permits'the described movement. When relay r ison its back contact, local circuit 30 is open, spring 22retractsactuator 20, and, with an impact, actuator 20 strikesscrew stop21 on'bar a, and bar a strikes its upper limit or back stop' 33. dashesof the Morse alphabet are transmitted by key 70,- the bar a strikesstops 32 and 38 alternately in exact conformity with key movements, andthe sound resulting vsharplydefines'dots and dashes as transmitted. Y i

' VVhat'I claim is 1 In an electromagnetic signaling device thecombination of an electromagnet, a pivoted, rigid contact bar, aretractor therefor, a rigid, resonant back stop for said bar, anactuator for said bar, means whereby said actuator, under closed circuitconditions, moves 1 with said bar and a fixed contact stop in positionto arrest said bar and pei mit said actuator to disengage itself.

2. In a; Morse code signal receiving device the combinationof'anelectromagnet, a reciprocating member, an. actuator thereforcontrolled bysaid magnet andlocated be tween said member and magnet, aspring re tractor for said member, a spring retractor for said actuator,means whereby when circuit is closed, said member and said actuator movein engagement, and'a fixed contact stop, in position to arrest saidmember at an intermediate point in said movement. a 3. The combinationOf'iLIl electromagnet, a pivoted, reciprocating bar, fixed, rigid, frontand back stops therefor, an actuator reciprocating intermediate said barand magnet, a. retractor common to, both bar and actuator, analternating current circuit for said magnet, a circuit breaker in saidcircuit and means whereby said actuator and bar move in engagement inone direction and move in engagement and then separate at anintermediate point, on the opposite movement. 1 a v 4. The combinationof an electromagnet, a pivoted, reciprocating I bar, 'fixed frontandback stops therefor, an actuator reciprocating intermediate said barand magnet, a retractor common togboth bar' and actuator, an alternatingcurrent circuit for said magnet, a circuit breaker in said circuit andmeans whereby said actuator and bar move in engagement under opencircuit condi- Copies of this patent may be obtained for It results thatwhen dots and tions, and move in engagement and separate when the barreaches a fixed contact stop, under closed circuit conditions.

5. The combination with an alternating current circuit and means formaking and breaking said circuit, of an electromagnet,

a pivoted, reciprocating, resonant bar, a reciprocating actuator forsaid bar, and means whereby actuator and bar move together under open"circuit -coiiditions and move together and separate when said barengages a fixed contact stop, underclosed circuit conditions.

6'. In a code telegraph receiving magnet the combination with an altrnating current circuit and acircuit breaker therefor of anelectromagnet in said circuit, a reciprocating member; fixed, up anddownfcon tacts therefor; an actuatorto control said memher in responsetoboth open and closed circuit conditions, and means whereby actuatorand bar, move in engagement on open circuitand move together 'and thenseparate on closed circuit, V

7. In a code telegraph receiving magnet the combination with analternating current circuit and a circuit breaker therefor o'f-anelectromagnet in said circuit, a reclprocatiiigbar, areciprocatingactuator, two opposite stops therefor, and'j'meanswherebysaid bar and actuatormove together to engage one sto p whencircuit is open, and move together but separate when said bar engagesitsopposite stop and circuit is closed.

8. The combination'in an electromagnetic signal deviceof analternating'current circuit, and acircuit breaker therefor of an electromagnet, apivoted reciprocating, rigid bar, a separate actuatortherefor,aretractor common to both',;a retractor adapted to oppose said retractorincontrolling said bar, aniup contact stop forsaid bar' and actuator, adown contact stop for said bar, and means wherebyfsaid actuator is at;tracted to said magnet, moves with said bar, and leaves said bar when itengages the fixed down contact,

9. In a receiving magnet for a code telegraph the combination with analternating current circuit and a circuit breaker therefor of anelectromagnet insaid circuit,a re'- ciprocati'ng, pivoted rigid member,a reciprocating actuator, front and back limit stops for said member andmeans whereby said actuator, "under closed circuit conditions, takes'a'position out of engagement with said bar. i

In witness whereof ,I have signed my JOHN J ennean.

five eents each, by addressing the Commissioner of Iatents, Washington,I). C. I i

